Alternativas ao Flownote para Heroku com licença gratuita

• Heroku
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone Apple Watch Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Firefox PortableApps.com Chrome Docker Heroku Termux
• Licença gratuita
  Qualquer licença Licença gratuita Licença Open Source Licença comercial